CN103649509A - Piston for an internal combustion engine - Google Patents
Piston for an internal combustion engine Download PDFInfo
- Publication number
- CN103649509A CN103649509A CN201280033582.2A CN201280033582A CN103649509A CN 103649509 A CN103649509 A CN 103649509A CN 201280033582 A CN201280033582 A CN 201280033582A CN 103649509 A CN103649509 A CN 103649509A
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- China
- Prior art keywords
- cooling channel
- piston
- contraction flow
- flow region
- region
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02F—CYLINDERS, PISTONS OR CASINGS, FOR COMBUSTION ENGINES; ARRANGEMENTS OF SEALINGS IN COMBUSTION ENGINES
- F02F3/00—Pistons
- F02F3/16—Pistons having cooling means
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01P—COOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES
- F01P3/00—Liquid cooling
- F01P3/06—Arrangements for cooling pistons
- F01P3/10—Cooling by flow of coolant through pistons
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02F—CYLINDERS, PISTONS OR CASINGS, FOR COMBUSTION ENGINES; ARRANGEMENTS OF SEALINGS IN COMBUSTION ENGINES
- F02F3/00—Pistons
- F02F3/16—Pistons having cooling means
- F02F3/20—Pistons having cooling means the means being a fluid flowing through or along piston
- F02F3/22—Pistons having cooling means the means being a fluid flowing through or along piston the fluid being liquid
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Pistons, Piston Rings, And Cylinders (AREA)
Abstract
The invention relates to a piston (10, 110, 210) for an internal combustion engine, comprising a piston head (11, 111, 211) and a piston skirt, said piston head (11, 111, 211) having a circumferential ring section (15, 115, 215) and a circumferential cooling channel (16, 116, 216) in the region of the ring section (15, 115, 215). The cooling channel has a cooling channel floor (17, 117, 217) and a cooling channel ceiling (18, 118, 218). According to the invention, the cooling channel (16, 116, 216) has a narrowing (20, 120, 220).
Description
Technical field
The present invention relates to a kind of internal combustion engine, this piston has piston head and piston skirt, wherein this piston head have around piston ring portion and in the region of this piston ring portion around cooling channel and this piston skirt working surface respectively with its compression-side and back pressure side.
Background technique
In modern internal-combustion engine, this piston bears high mechanical load and extra high heat load.Therefore need in principle coolingly to reach all the time best degree by what coolant feed in cooling channel, was particularly made to piston in the region of piston top.
Summary of the invention
The object of the invention is to, improve so this piston, that is, further improve the cooling action in piston top region.
Implementation is, makes cooling channel have contraction flow region.
The present invention is based on fluid dynamic continuity equation, that is, about the contraction flow region of the stream of liquid in flowing liquid transverse section, cause the raising of flow stream velocity.In piston according to the present invention, contraction flow region arranged according to the present invention not only makes around mobile freezing mixture, fully to be mixed in cooling channel under the acting in conjunction with oscillator effect, but also is accelerated targetedly and carried towards the direction of piston top by contraction flow region.Thereby make like this wall portion in piston top region, cooling channel, extreme heat of more effectively and more continually flowing through in obviously than the piston known up to now through abundant mixing and cooling freezing mixture in each stroke of piston.Thereby therefore improved the thermal conductivity between cooling channel wall and freezing mixture and obviously improved the cooling effect according to piston of the present invention.
Favourable expansion scheme is provided by dependent claims.
Contraction flow region arranged according to the present invention has to the spacing at the bottom of cooling channel in suitable mode, this spacing at least equal cooling channel axial height 1/3rd and/or the maximum axial height that equals cooling channel 2/3rds.Speed up coolant is mobile to the direction on top, cooling channel very effectively thus.In order to optimize this acceleration effect, contraction flow region preferably has distance about equally to top, Di Hedao cooling channel, cooling channel.
This contraction flow region form aptly around contraction flow region, to produce acceleration effect along whole cooling channel.
A preferred expansion scheme is, by the lucky Material reinforcement portion at wall place, cooling channel, forms contraction flow region, and top, cooling channel forms dome shape substantially.Force thus freezing mixture rounded around flowing in the region on top, cooling channel, in therefore each stroke of piston, freezing mixture interacts with cooling channel wall in multiple times.To this, the freezing mixture of lower temperature is accelerated and supply by contraction flow region all the time.When withstanding on its widest locational radial dimension in the cooling channel that is substantially dome shape and at least equaling the twice of contraction flow region radial dimension, this effect is effective especially.In this case, not too hot refrigerant downstream, does not therefore hinder the freezing mixture of lower temperature mobile towards the direction on top, cooling channel through contraction flow region significantly.
Of the present invention another preferably designs and is, by lucky two Material reinforcement portions opposed facing, on two cooling channel walls, forms contraction flow region.This design is specially adapted to the piston being formed through friction welding by a plurality of parts, and when weld seam extends through cooling channel, overlap has formed opposed facing Material reinforcement portion, and these Material reinforcement portions have caused contraction flow region.
In this design proposal, particularly advantageously, cooling channel withstands on its summit has shunt, and this shunt is arranged on the neutral position with respect to contraction flow region.In this case, force and by contraction flow region, accelerate mobile freezing mixture and in the region on cooling channel top, form the fluid of two bursts of counterrotatings, these two strands of coolant fluids can interact with the sidewall of cooling channel in multiple times in each stroke of piston.To this, the freezing mixture of lower temperature is accelerated and supply by contraction flow region all the time.When withstanding on its widest locational radial dimension in cooling channel and at least equaling the twice of contraction flow region radial dimension, this effect is effective especially.In this case, not too hot refrigerant downstream, does not therefore hinder the freezing mixture of lower temperature to flow through contraction flow region significantly.
In order to optimize this effect, can make extraly region top, cooling channel, that be connected on shunt form arc or circular cross section.In addition the cross section that, makes shunt form V-arrangement or taper is suitable especially.
In order further to optimize the mobility status in cooling channel, the cooling channel wall of adjacent piston ring portion is vertically formed or slopes inwardly and forms.
Another decision design of the present invention is, by lucky two axial mutual dislocation Material reinforcement portion that arrange, on two cooling channel walls formation contraction flow region.This design proposal make to form the outside enlarged portion of adjacent piston ring portion and/or piston top bank in the region on cooling channel top and in the region at the bottom of cooling channel, form in the middle of piston top, the interior expansion portion of the contiguous piston top pit existing if desired particularly.Very effectively to the region of the special high heat load of piston head, carry out cooling thus.
In this design proposal, for example can affect thus cooling effect, that is, two Material reinforcement portions have different thickness, thereby two enlarged portion have different big or small radiuses.The enlarged portion with relatively large radius can be arranged in the region of heat load maximum of piston head.
The present invention is applicable to all piston types and piston structure and can be achieved with any piston material.
Accompanying drawing explanation
Elaborate with reference to the accompanying drawings embodiments of the invention below.Wherein, with schematically, do not illustrate in the diagram of accurate ratio:
Fig. 1 illustrates the first embodiment according to piston of the present invention with part section;
Fig. 2 has illustrated another embodiment according to piston of the present invention with part section stereogram;
Fig. 3 illustrates another embodiment according to piston of the present invention with part section.
Embodiment
Fig. 1 shows the first embodiment according to piston 10 of the present invention.This piston 10 can be the piston of a parts formation or the piston that a plurality of parts form.This piston 10 can be made by steel and/or light metal material.Fig. 1 exemplarily shows the piston head consisting of parts 11 according to piston 10 of the present invention.This piston head 11 has: the piston top 12 that comprises piston top pit 13, around piston top bank 14 and for receiving the piston ring portion 15 of piston ring (not shown).The At The Height of piston ring portion 15 be provided with around cooling channel 16, this cooling channel has at the bottom of cooling channel 17 and top, cooling channel 18.In addition, piston 10 also has piston skirt in known manner, this piston skirt can form with piston head 11 single types or form as independent parts, is connected or for example according to the connected (not shown) of the type of hinge piston this piston skirt and piston head 11 are fastening in known manner.
In this embodiment of the present invention, cooling channel 16 have around contraction flow region 20.By lucky Material reinforcement portion 21 in the cooling channel wall of adjacent piston top pit 13, form these contraction flow regions 20 in the present embodiment.The cooling channel wall 22 of adjacent piston ring portion 15 is formed generally perpendicularly in the present embodiment.This cooling channel wall also can slope inwardly a little, that is, towards the direction of piston top pit 13, be formed obliquely.
The top, cooling channel 18 of cooling channel 16 forms dome shape substantially.Contraction flow region 20 has substantially at the bottom of cooling channel 17 and push up 18 identical distance A to cooling channel on its narrowest position in the present embodiment.Therefore force the freezing mixture in the region on top, cooling channel 18 with circular ring, to stream moving, as circular arrow is shown, in therefore each stroke of piston, freezing mixture can interact with cooling channel wall in multiple times in the region of piston top 12 and piston top pit 13.To this, the freezing mixture of lower temperature is accelerated and supply by contraction flow region 20 all the time.In order to optimize this effect, the top 18, cooling channel that is substantially in the present embodiment dome shape at least equals the twice of the radial dimension b of contraction flow region 20 at its widest locational radial dimension B, that is, and and B >=2 * b.In this case, not too hot freezing mixture can flow downward, and does not therefore hinder significantly the freezing mixture of lower temperature mobile towards the direction on top, cooling channel 18 through contraction flow region 20.
Can be in known manner by method manufactures such as casting, forging, sintering according to piston 10 of the present invention or piston head 11.As shown in Figure 1, the cooling channel that can design according to the present invention by the method manufacture of casting by salt core in known manner in the piston head 11 of single type.
Fig. 2 shows another embodiment according to piston 110 of the present invention.This piston 110 can be the piston of a parts formation or the piston that a plurality of parts form.This piston 110 can be made by steel and/or light metal material.Fig. 2 exemplarily shows the piston head consisting of parts 111 according to piston 110 of the present invention.This piston head 111 has: the piston top 112 that comprises piston top pit 113, around piston top bank 114 and for receiving the piston ring portion 115 of piston ring (not shown).The At The Height of piston ring portion 115 be provided with around cooling channel 116, this cooling channel has at the bottom of cooling channel 117 and top, cooling channel 118.In addition, piston 110 also has piston skirt in known manner, this piston skirt can form with piston head 111 single types or form as independent parts, is connected or for example according to the connected (not shown) of the type of hinge piston this piston skirt and piston head 111 are fastening in known manner.
In this embodiment of the present invention, cooling channel 116 have around contraction flow region 120.By the Material reinforcement portion 121 in lucky two opposed facing, cooling channel walls of adjacent piston top pit 13 and the cooling channel wall of adjacent piston ring portion 115, form these contraction flow regions 120 in the present embodiment.
Top, the cooling channel of cooling channel 116 118 has shunt 123 on its summit in the present embodiment, and this shunt is arranged on the neutral position with respect to contraction flow region 120.In the present embodiment, to 117 distance at the bottom of cooling channel and contraction flow region 120, to push up 118 distance to cooling channel roughly the same for contraction flow region 120.Therefore force by the mobile freezing mixture of contraction flow region 120 acceleration and in the region on top, cooling channel 118, form the fluid of two counterrotatings, as reverse circular arrow is shown, in therefore each stroke of piston, freezing mixture can interact with the sidewall of cooling channel 116 in multiple times in the region of piston top 112 and piston top pit 113.To this, the freezing mixture of lower temperature is accelerated and supply by contraction flow region 120 all the time.In order to optimize this effect, top 118, cooling channel at least equals the twice of contraction flow region 120 radial dimension b at its widest locational radial dimension B in the present embodiment, that is, and and B >=2 * b.In this case, not too hot freezing mixture can flow downward, and does not therefore hinder significantly the freezing mixture of lower temperature mobile towards the direction on top, cooling channel 118 through contraction flow region 120.
In order to optimize this effect, region 118a, 118b top, cooling channel 118, that be connected on shunt 123 form the cross section of arc or circle and the cross section that shunt 123 forms V-arrangement in the present embodiment.
Can be in known manner by method manufactures such as casting, forging, sintering according to piston 110 of the present invention or piston head 111.As shown in Figure 2, the cooling channel 116 that can design according to the present invention by the method manufacture of casting by salt core in known manner in the piston head 111 of single type.If piston head 111 is formed by two parts and these two parts interconnect by friction welding, the seam of friction welding can be passed cooling channel 116 so, therefore can pass through the opposed facing Material reinforcement of friction welding neoplasia portion 121, these Material reinforcement portions have produced contraction flow region 120, and this friction overlap produces in known manner in friction welding process.
Fig. 3 shows another embodiment according to piston 210 of the present invention.This piston 210 can be the piston of a parts formation or the piston that a plurality of parts form.This piston 210 can be made by steel and/or light metal material.Fig. 3 exemplarily shows the piston head consisting of parts 211 according to piston 210 of the present invention.This piston head 211 has: the piston top 212 that comprises piston top pit 213, around piston top bank 214 and for receiving the piston ring portion 215 of piston ring (not shown).The At The Height of piston ring portion 215 be provided with around cooling channel 216, this cooling channel has at the bottom of cooling channel 217 and top, cooling channel 218.In addition, piston 210 also has piston skirt in known manner, this piston skirt can form with piston head 211 single types or form as independent parts, is connected or for example according to the connected (not shown) of the type of hinge piston this piston skirt and piston head 211 are fastening in known manner.
In this embodiment of the present invention, cooling channel 216 have around contraction flow region 220.The 221a of Material reinforcement portion, 221b that by lucky two axial mutual dislocation, arrange in the present embodiment, in the cooling channel wall of adjacent piston top pit 213 and the cooling channel wall of adjacent piston ring portion 215 form this contraction flow region 220.In 217 region at the bottom of cooling channel, form thus the interior expansion portion 224 of extending to piston top pit 213.In addition in the region on cooling channel top 218, form to circular groove piston ring portion 215, the topmost part and the outside enlarged portion 225 of extending to piston top bank 214.This makes in engine operation process region cooling piston head 211, special high heat load, i.e. piston top 212 in piston top pit 213 and piston top bank 214 regions very effectively.Also affected thus in the present embodiment cooling effect, that is, made the 221a of Material reinforcement portion have thickness D1, this thickness is greater than the thickness D2 of the 221b of Material reinforcement portion.Therefore, interior expansion portion 224 has than the larger radius of outside enlarged portion 225.Therefore in the present embodiment, the special effectively cooling region of piston top pit when engine running.Certainly, the 221b of Material reinforcement portion also can have the larger thickness than the 221a of Material reinforcement portion, in this case, outside enlarged portion 225 has the radius larger than interior expansion portion 224, the region (not shown) of therefore special effectively cooling piston top 213 and piston top bank 214.
Enlarged portion 224,225 can be in the scope that structure allows extending to inside or outside any distance in the radial direction, as partly illustrated in lines in Fig. 3.
At the bottom of the cooling channel of cooling channel 216 217 and cooling channel top 218 form substantially dome shape.Contraction flow region 220 has substantially at the bottom of cooling channel 217 and push up 218 identical distance A to cooling channel on its narrowest position in the present embodiment.Therefore force at the bottom of cooling channel 217 and the region on top, cooling channel 218 in freezing mixture with circle counterclockwise around flowing, as circular arrow is shown.In therefore each stroke of piston, freezing mixture can interact with cooling channel wall in multiple times in the region of piston top 212 and piston top pit 213.To this, the freezing mixture of lower temperature is accelerated and supply by contraction flow region 220 all the time.In order to optimize this effect, the portion of interior expansion in the present embodiment 224 and outside enlarged portion 225 they separately the widest locational radial dimension B at least equal the twice of the radial dimension b of contraction flow region 20, that is, B >=2 * b, as shown in the example of Fig. 1 peripheral enlarged portion 225.In this case, not too hot freezing mixture can flow downward, and through contraction flow region 220, the direction towards top, cooling channel 218 flows and the effectively cooling region of piston top 212 freezing mixture that does not therefore hinder significantly lower temperature.Because some freezing mixture new, lower temperature streams moving in the region at the bottom of cooling channel with circular ring simultaneously, rather than upwards flow by contraction flow region 220, to this, this freezing mixture is not subject to superheating by the hot freezing mixture refluxing from the region on top, cooling channel 218, the therefore yet effectively cooling region of piston top pit.
Can be in known manner by method manufactures such as casting, forging, sintering according to piston 210 of the present invention or piston head 211.As shown in Figure 3, the cooling channel 216 that can design according to the present invention by the method manufacture of casting by salt core in known manner in the piston head 211 of single type.
Claims (15)
1. an internal combustion engine (10, 110, 210), described piston has piston head (11, 111, 211) and piston skirt, wherein said piston head (11, 111, 211) have around piston ring portion (15, 115, 215) and in described piston ring portion (15, 115, in region 215), around cooling channel (16, 116, 216), at the bottom of described cooling channel has cooling channel (17, 117, 217) and cooling channel top (18, 118, 218), it is characterized in that, described cooling channel (16, 116, 216) there is contraction flow region (20, 120, 220).
2. piston according to claim 1, it is characterized in that, described contraction flow region (20,120,220) has to the spacing of (17,117,217) at the bottom of described cooling channel, described spacing at least equal described cooling channel (20,120,220) axial height 1/3rd.
3. piston according to claim 1, it is characterized in that, described contraction flow region (20,120,220) has to the spacing of (17,117,217) at the bottom of described cooling channel, described spacing maximum equal described cooling channel (20,120,220) axial height 2/3rds.
4. piston according to claim 1, is characterized in that, described contraction flow region (20,120,220) has substantially to (17,117,217) at the bottom of described cooling channel with to top, described cooling channel (18,118,218) identical distance (A).
5. piston according to claim 1, is characterized in that, described contraction flow region (20,120,220) form around contraction flow region (20,120,220).
6. piston according to claim 1, is characterized in that, form described contraction flow region (20), and top, cooling channel (18) forms dome shape substantially by the lucky Material reinforcement portion (21) at wall place, cooling channel.
7. piston according to claim 6, is characterized in that, the top, cooling channel (18) that is substantially dome shape at least equals the twice of the radial dimension (b) of contraction flow region (20) at its widest locational radial dimension (B).
8. piston according to claim 6, is characterized in that, described cooling channel (16) have the cooling channel wall (22) of adjacent piston ring portion (15), and described cooling channel wall is vertically formed or slopes inwardly and forms.
9. piston according to claim 1, is characterized in that, by lucky two Material reinforcement portions (121) opposed facing, on two cooling channel walls, forms described contraction flow region (120).
10. piston according to claim 8, is characterized in that, described top, cooling channel (118) has shunt (123) on its summit, and described shunt is arranged on the neutral position with respect to described contraction flow region (120).
11. pistons according to claim 9, is characterized in that, region (118a, 118b) described top, cooling channel (118), that be connected on described shunt (123) forms arc or circular cross section.
12. pistons according to claim 9, is characterized in that, described shunt (123) forms the cross section of V-arrangement or taper.
13. pistons according to claim 8, is characterized in that, described top, cooling channel (118) at least equals the twice of the radial dimension (b) of described contraction flow region (120) at its widest locational radial dimension (B).
14. pistons according to claim 1, is characterized in that, by lucky two axial mutual dislocation, Material reinforcement portion (221a, 221b) that arrange, on two cooling channel walls forms contraction flow region (220).
15. pistons according to claim 14, is characterized in that, two Material reinforcement portions (221a, 221b) have different thickness.
Applications Claiming Priority (5)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102011106562 | 2011-07-05 | ||
| DE102011106562.1 | 2011-07-05 | ||
| DE102011116332.1 | 2011-10-19 | ||
| DE102011116332A DE102011116332A1 (en) | 2011-07-05 | 2011-10-19 | Piston for an internal combustion engine |
| PCT/DE2012/000670 WO2013004215A1 (en) | 2011-07-05 | 2012-07-04 | Piston for an internal combustion engine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103649509A true CN103649509A (en) | 2014-03-19 |
| CN103649509B CN103649509B (en) | 2019-10-15 |
Family
ID=47426675
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201280033582.2A Active CN103649509B (en) | 2011-07-05 | 2012-07-04 | Internal combustion engine |
Country Status (8)
| Country | Link |
|---|---|
| US (1) | US9109530B2 (en) |
| EP (1) | EP2729689B1 (en) |
| JP (1) | JP6335781B2 (en) |
| KR (1) | KR101962988B1 (en) |
| CN (1) | CN103649509B (en) |
| BR (1) | BR112014000079B1 (en) |
| DE (1) | DE102011116332A1 (en) |
| WO (1) | WO2013004215A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114278455A (en) * | 2020-09-27 | 2022-04-05 | 马勒汽车技术（中国）有限公司 | Piston with divided-flow type inner cooling flow passage |
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| DE102012014192A1 (en) | 2012-07-18 | 2014-01-23 | Mahle International Gmbh | Piston e.g. single-part piston for e.g. diesel engine of passenger car, has cooling passage provided with passage wall adjacent to ring portion, and annular component provided in region of wall and comprising edge that projects into passage |
| DE102012215541A1 (en) | 2012-08-31 | 2014-03-06 | Mahle International Gmbh | piston |
| JP6209382B2 (en) * | 2013-07-24 | 2017-10-04 | 日立オートモティブシステムズ株式会社 | Piston for internal combustion engine, piston manufacturing method and manufacturing apparatus |
| WO2017150321A1 (en) * | 2016-03-02 | 2017-09-08 | 本田技研工業株式会社 | Piston of internal combustion engine and method for manufacturing same |
| DE102016224280A1 (en) * | 2016-06-02 | 2017-12-07 | Mahle International Gmbh | Piston of an internal combustion engine |
| DE102019213953A1 (en) * | 2019-09-12 | 2021-03-18 | Mahle International Gmbh | Pistons for an internal combustion engine |
| DE102019219614A1 (en) * | 2019-12-13 | 2021-06-17 | Mahle International Gmbh | Pistons for an internal combustion engine |
| US11326549B2 (en) * | 2020-01-21 | 2022-05-10 | Ford Global Technologies, Llc | 218-0266 volcano-shaped inlet of piston oil-cooling gallery |
| DE102020207512A1 (en) | 2020-06-17 | 2021-12-23 | Mahle International Gmbh | Method of making a piston |
| WO2022120178A2 (en) * | 2020-12-03 | 2022-06-09 | Cummins Inc. | Piston, block assembly, and method for cooling |
| DE102021203241A1 (en) | 2021-03-30 | 2022-10-06 | Mahle International Gmbh | Piston for an internal combustion engine and method of manufacturing the piston |
| DE102021211034A1 (en) | 2021-09-30 | 2023-03-30 | Mahle International Gmbh | Pistons |
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2011
- 2011-10-19 DE DE102011116332A patent/DE102011116332A1/en active Pending
-
2012
- 2012-07-04 EP EP12755778.3A patent/EP2729689B1/en active Active
- 2012-07-04 WO PCT/DE2012/000670 patent/WO2013004215A1/en active Application Filing
- 2012-07-04 KR KR1020147002473A patent/KR101962988B1/en active IP Right Grant
- 2012-07-04 CN CN201280033582.2A patent/CN103649509B/en active Active
- 2012-07-04 JP JP2014517453A patent/JP6335781B2/en active Active
- 2012-07-04 BR BR112014000079-4A patent/BR112014000079B1/en active IP Right Grant
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| DE4018252A1 (en) * | 1990-06-07 | 1991-12-12 | Man B & W Diesel Ag | Oil cooled IC engine - has oil deflection ring to recirculate oil in internal chamber in position |
| JPH10184450A (en) * | 1996-12-26 | 1998-07-14 | Isuzu Motors Ltd | Piston with cooling cavity part and manufacture thereof |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114278455A (en) * | 2020-09-27 | 2022-04-05 | 马勒汽车技术（中国）有限公司 | Piston with divided-flow type inner cooling flow passage |
| US11713729B2 (en) | 2020-09-27 | 2023-08-01 | Mahle Automotive Technologies (China) Co., Ltd. | Piston for splitting internal cooling runner |
| CN114278455B (en) * | 2020-09-27 | 2023-12-19 | 马勒汽车技术（中国）有限公司 | Piston with split-flow internal cooling flow channel |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103649509B (en) | 2019-10-15 |
| KR20140050020A (en) | 2014-04-28 |
| WO2013004215A1 (en) | 2013-01-10 |
| JP2014520991A (en) | 2014-08-25 |
| EP2729689B1 (en) | 2024-04-17 |
| US9109530B2 (en) | 2015-08-18 |
| BR112014000079B1 (en) | 2021-08-03 |
| EP2729689A1 (en) | 2014-05-14 |
| JP6335781B2 (en) | 2018-05-30 |
| KR101962988B1 (en) | 2019-03-27 |
| US20140290618A1 (en) | 2014-10-02 |
| BR112014000079A2 (en) | 2017-02-14 |
| DE102011116332A1 (en) | 2013-01-10 |
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